A strange UFO has been captured on camera as it hovered in the sky above spectators at a US golf tournament.

Television viewers watching the Players Championship part of the PGA Tour , held in Ponte Vedra Beach, Florida, noticed the mysterious object as the camera panned into the air to follow one of the golf shots.

It is reported that the incident occurred on May 9.

Is it an alien? Mysterious object hovers over spectators at the game (Image: YouTube)

The baffled viewer told the Mutual UFO Network : "When you see the pictures, people may think 'oh, that's a blimp,' but after seeing the blimp in other clips, I can easily conclude it's not the blimp."

The anonymous viewer added: "I also looked for other aircrafts flying by and nothing seemed plausible.

"The object did have a reflective surface. In the picture, you'll see a golf ball, a bird, and the flash reflection, while the other object is the unknown craft .

Close up: Sceptics have claimed the dark object is just another bird

"You can also notice the object appears to be at a very high altitude for any aircrafts being used for the tournament. I rewind and slow motion, fast forward dozens of times. Very strange."

But others are not so convinced, concluding that the object appears to change shape in the air, prompting speculation that it is simply a bird 'in the middle of a wing stroke'.